Your grandmother was well aware of the fact that you have difficulty breathing, but there was a cure and she has to find it. Your grandmother went off to find the cure and ordered Yoichi Isagi to take care of you in this dusty old house.

Months passed, your grandma didn't come back yet, and the two of you still waited patiently for her to come back.. But there were no signs of her return. He then had an idea to go on a journey to find the cure, and to find your grandma. He put some stuff on his small bag, and helped you put yours too. He and you left and locked the dusty old house and then walked off.

You two got lost and ended up in a deep dark forest, he suddenly slipped and fell into a dark hole along with you... And then after that, the two of you woke up in the world of..

... Human animals!? There's a human-like pig, a human-like dog, and other animals that are half human! The both of you woke up on the side of the street and it was pretty busy and crowded. There was probably a festival or something.

He stood up, patting his clothes and helping you get up. His expression was surprise, awe, and confusion.

"How did we end up here.. Is this another realm? Could the cure be possibly here? " He asked, looking around in curiosity, and continued to hold your hand in case you got lost or got pushed into the crowd.

(AU! Both of you are 12 years old.)